The relationship between muscle metabolic pathways and marbling of beef

TL;DRAbstract

Three muscle types were taken from 4 groups of steers of different genotypes which express either high (Angus, Japanese Black x Angus) or low (Limousin) levels of marbled meat. Expression or activities of different proteins or enzymes controlling energy metabolism were determined. Angus and Crossbred animals were characterised by a more oxidative muscle metabolism (especially a higher cytochrome-c oxidase activity) and a higher protein content of adipocyte fatty acid binding protein. The latter was considered as a good predictor of marbling.

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